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Incoming correspondence from William Hemsley Emory to John Torrey, for 1847-1857. The correspondence discusses Torrey's work identifying specimens collected by Emory and others on a military reconnaissance expedition through the southwestern United States in 1846-1847, and on the United States and Mexican Boundary Survey in 1848-1855. Topics: Emory, William H. (William Hemsley), 1811-1887 -- Correspondence., Torrey, John, 1796-1873 --...